The number of neutrons in tritium is

Given below are two statements:
Assertion $(A)$: Protium and deuterium differ in their rates of reactions.
Reason $(R)$: They have different enthalpies of bond dissociation.
The correct answer is:

Identify the correct statement from the following.

Calcium cyanamide on treatment with steam under pressure gives $NH_3$ and

Write a note on metallic or non-stoichiometric hydrides.

Discuss the position of hydrogen in the modern periodic table.